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    Subject[PATCH 1/4] ARM: LPC32xx: Set system serial based on cpu unique id
    Date
    From: Alexandre Pereira da Silva <aletes.xgr@gmail.com>

    LPC32xx SoC has a 128 bits unique id that can be used as a system
    serial number, if none has been provided by atags or dt.

    Signed-off-by: Alexandre Pereira da Silva <aletes.xgr@gmail.com>
    Signed-off-by: Roland Stigge <stigge@antcom.de>
    ---
    arch/arm/mach-lpc32xx/common.c | 10 ++++++++--
    1 file changed, 8 insertions(+), 2 deletions(-)

    --- linux-2.6.orig/arch/arm/mach-lpc32xx/common.c
    +++ linux-2.6/arch/arm/mach-lpc32xx/common.c
    @@ -26,6 +26,7 @@
    #include <linux/io.h>

    #include <asm/mach/map.h>
    +#include <asm/system_info.h>

    #include <mach/hardware.h>
    #include <mach/platform.h>
    @@ -224,7 +225,7 @@ void lpc23xx_restart(char mode, const ch
    ;
    }

    -static int __init lpc32xx_display_uid(void)
    +static int __init lpc32xx_check_uid(void)
    {
    u32 uid[4];

    @@ -233,6 +234,11 @@ static int __init lpc32xx_display_uid(vo
    printk(KERN_INFO "LPC32XX unique ID: %08x%08x%08x%08x\n",
    uid[3], uid[2], uid[1], uid[0]);

    + if (!system_serial_low && !system_serial_high) {
    + system_serial_low = uid[0];
    + system_serial_high = uid[1];
    + }
    +
    return 1;
    }
    -arch_initcall(lpc32xx_display_uid);
    +arch_initcall(lpc32xx_check_uid);

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